Initial investigation of toJS error

Co-authored-by: mathiasrw <[email protected]>

Author: Copilot

test_issue_temp.js

@@ -0,0 +1,18 @@
+if (typeof exports === 'object') {
+var assert = require('assert');
+var alasql = require('.');
+}
+
+// Test the issue with INSERT INTO with SELECT subquery
+try {
+alasql('DROP TABLE IF EXISTS t');
+alasql('CREATE TABLE t (report_type string, inv_qty number, week number, month number, year number)');
+console.log('Table created');
+alasql('INSERT INTO t(report_type,inv_qty,week,month,year) VALUES ((SELECT \'k\',1,2,3,4))');
+console.log('Insert executed');
+var res = alasql('SELECT * FROM t');
+console.log('Result:', JSON.stringify(res));
+} catch(e) {
+console.log('Error:', e.message);
+console.log('Stack:', e.stack);
+}

test_parse.js

@@ -0,0 +1,5 @@
+var alasql = require('.');
+
+// Test parsing the problematic query
+var parsed = alasql.parse('INSERT INTO t(report_type,inv_qty,week,month,year) VALUES ((SELECT \'k\',1,2,3,4))');
+console.log('Parsed:', JSON.stringify(parsed, null, 2));